hello, my 7 half month old has been sleeping alot past few weeks, from half 7 at night untill 9-10 in the morning, has breakfast..yawns untill his 2 hour nap at 11is.. has lunch yawns untill second nap for 2 hours at 3.. then awake two bottles untill he goes to bed again. I took him to the doctor and she says some babies need more sleep but I wanted other peoples opinions, he literally yawns untill every nap or bedtime